We Are Ophthalmology LTD We Care About Your Health

Over the years, Ophthalmology LTD's name has become associated with the highest quality of comprehensive medical and surgical eye care. Highly trained ophthalmologists Bryan Hammer, Eric Thomas, Dustin Dierks, Ryan Geraets, Michael Eide, Elizabeth Atchison, Elise In’t Veld, Karen Dickes, and Andrea Bordewyk, as well as experienced optometrists Andrea McCann, Emily Walters, and Tyler Vermeer combine their considerable expertise to give each and every patient the best possible care. Ophthalmology LTD delivers treatment for cataracts, glaucoma, diabetic eye disease, as well as cornea transplants, oculoplastic surgery, retina surgery, vitreoretinal surgery, and pediatric eye care in Sioux Falls.

The Region’s Most Trusted, Experienced Eye Surgeons

Ophthalmology LTD brings the finest eye specialists in South Dakota to satellite offices in the tri-state area: Luverne, Pipestone, Worthington and Windom in Minnesota, Rock Valley, Sibley, and Sioux Center in Iowa, as well as Dell Rapids, Madison, Mitchell, Watertown, and Yankton in South Dakota.


In 1968, Ophthalmology LTD revolutionized eye care by taking a comprehensive approach, bringing patients a full range of vision specialties under one roof. Today, eye care teams across the nation are now mimicking the strategy we have spent more than 50 years perfecting. It is because of this experience and our genuine dedication to our patients that our team is widely considered the finest, most comprehensive group of sub-specialty eye surgeons in the tri-state Siouxland area.

Our Services

Our ophthalmologists have expertise in a wide range of specialties and work as a team to meet your eye care needs.


Not only is cataract treatment the most frequently performed surgery in the United States, it is also one of the most successful. More than 99% of patients who undergo cataract removal rank their vision as significantly improved. Drs. Hammer, Dierks, Eide, In't Veld, West, and Dickes perform this highly effective procedure.

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Early detection and treatment is the key to preventing vision loss with Glaucoma. More than three million Americans have glaucoma, but only half are actually aware that this "silent thief" is slowly and without warning stealing away their vision, sometimes without any noticeable symptoms. Drs. In't Veld and Dickes at Ophthalmology LTD specializes in the diagnosis and treatment of glaucoma.

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Children should have a yearly comprehensive eye exam along with their parents. Many vision problems can be detected early and treated before they become detrimental to a child's development, learning abilities, and every day function. Dr. West of Ophthalmology LTD has 22 years of experience in the evaluation and treatment of children's vision.

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The retina functions much like the film in a camera, and when film is damaged, so is the picture. Our retinal specialists Drs. Geraets, Thomas, and Atchison  offer comprehensive retinal exams and treatment to protect against diseases such as diabetic retinopathy that can damage your retina and vision.

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If a window pane is distorted or marred by imperfections, it is difficult to see out through it clearly. Your cornea is your eye’s window. To keep it clear or to restore it to its proper state, Dr. Eide of Ophthalmology LTD uses his specialty training in corneal diseases to treat dry eye, keratoconus, and other conditions that can cause corneal imperfections.

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When your eyelids, eye sockets, or tear ducts malfunction, or a tumor threatens your vision, Ophthalmology LTD oculoplastic surgeon Dr. Hammer can help. Specializing in procedures that restore clear vision as well as a more youthful appearance, Dr. Hammer treats and manages a wide variety of ocular conditions.

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We are a team of passionate professionals with
caring for patients in South Dakota, Minnesota, & Iowa.

Have a look around, then call, request an appointment online, or come by to learn more about how our team of eye experts can help you and your family.

  • Sheri H.
    Dr. Emily Walters a great Doctor & here staff
  • Julie B.
    Thank you, Emily Walters, for excellent care. I always have a good experience at Ophthalmology, Ltd!
  • Barb W.
    My husband and I have had some “unique” vision problems recently! Dr Walters has patiently, professionally, and honestly given us excellent care and treatment! We would highly recommend Dr Walters and Ophthalmology LTD!
  • david w.
    It always amazes me on their efficiency and the good people they hire especially Dr McCann she's very good and her profession
  • Brady S.
    Had an acute episode of flashing lights in one eye. They got me in ASAP. Professional staff. Dr. In’t Velt provided excellent care and an explanation of what was happening. 5 star care!
  • Sheryl K.
    Very professional and caring - I would definitely recommend Dr Emily Walter
  • Dennis K.
  • Denise W.
    Wonderful Doctors and staff
  • Patrick O.
    Everyone was professional and polite. Very much on time. Very detailed in procedures and instructions
  • Chuck
    The staff at Opthamology LTD are very friendly, helpful, and professional. Dr. Atchison makes me feel very at ease. She explains everything very thoroughly, and since my surgery went well, she obviously knows her stuff and has very steady hands.... read more
  • Brenda S.
    The staff at ophthalmology Limited or always professional and well qualified. When I lost the vision in my right eye that was the first place I wanted to go. They checked it out and told me it would clear up... read more
  • Denise W.
    retinopathy treatment and cataract treatment8
  • Scott A.
    The entire visit was a great experience. The nurses were friendly, knowledgeable, and helpful. Dr. Thomas spent the full time needed to hear and answer my questions. I left comfortably assured my eyes were in great hands.
  • Kathy J.
    Josh and Dr Walters were friendly, very knowledgeable and kept me informed if everything they were doing. Great experience!
  • Zainab H.
    Thankful to Dr. Walters for her caring ! Dr. Walters is smart and professional Opthamologist . I do trust her diagnosis and treatment. I highly recommend her for friends and family. Staff is friendly and helpful! Appreciate it !
  • Stephen J.
    I was able to get in the same day to get checked for a possible detached retina. They had me there in an hour and fully checked and on my way less than an hour later. Good attention to detail... read more
  • Bruce K.
    As always, great care
  • Trent D.
    The staff was very friendly and competent. They made me feel relaxed. The surgery was successful. Dr. Eide is an excellent doctor.
  • Elaine K.
    The entire staff is amazing.
  • Paul B.
    Knowledgeable and kind staff. I appreciated the expertise and communication given to me by Dr. Atchison as she reviewed my history and imaging. I recommend Ophthalmology LTD for your eye needs
  • Catherine C.
    I have actually enjoyed my experience so far. I am pre-surgical however, based on my initial consult for surgery, I am actually looking forward to having my cataracts removed. From my point of first contact with Hillary at the front... read more
  • Sonja C.
    Was pleased to see Dr. Dierks after 10 years and glad to find out it was nothing too much to worry about. Picked up the eye drops he recommended for dry eyes on the way home. Have used them twice... read more
  • Donna Y.
    Short wait. Doctor listened carefully and explained fully. Staff were l friendly.
  • Brenda L.
    I have been a patient there for several years and I have always been treated very well. The staff is kind and courteous. The physician has always been willing to answer any questions I have. I would recommend them to everyone.
  • Diane G.
    Very courteous staff and efficient. Knowledgeable and caring. Take the time to explain things thoroughly.
  • Kelly V.
    I am so glad I was told about Ophthalmology LTD. In and out in a reasonable time and they take the time to listen to you. Great job to all the doctors and staff.
  • anita a.
    Very professional and thoughtful.
  • Nancy B.
    Dr Atchison is excellent, professional and easy to talk to.
  • Gayle H.
    I have been a patient of Dr. Eide’s at Ophthalmology, Ltd for many years. He is so personable and so thorough when doing an exam. I would highly recommend Dr. Eide!!
  • Dawn C.
    Friendly, efficient staff. Dr. Walters is very good at taking time with you and making sure that you understand and are comfortable with the treatment plan. Very thorough and pleasant.
  • Sue S.
    I was seen for a possible retinal tear. They got me in right away, were professional, explained everything to me and they were so kind.
  • John B.
    Very busy but moved me thru all checks very quickly.
  • Rice J.
    They were very helpful. wonderful experience. 10 out of 10. Very helpful.
  • Mary R.
    I had a very thorough eye exam. Thankyou
  • Susan f.
    Dr Hammer at Opthomology LTD did a great job on my cataract surgery. His staff made me feel so comfortable & did a thorough job of tending to my needs. I would highly recommend them to care for your opthomology needs.
  • Ellyn J.
    Nice staff, answered all my questions
  • Theresa P.
    Very friendly and very thorough as always.
  • Robert E.
    Professional staff, knowledgeable and informative are just some of the qualities of Dr. Atchison. When I moved to Iowa I needed to find a retina specialist so I chose Dr. Atchison, and I’m glad I did.
  • Kathleen B.
    Grateful for the service ~ such a friendly environment ~ thank you for the great service!! Highly recommend Dr. Hammer and his colleagues for your eye care needs.
  • Tom A.
    Front desk was courteous and friendly, I was called to examine room in a timely manner, nurse or individual who did preliminary work up seemed knowledgeable friendly and efficient. Doctor was very clear on her findings and the options... read more
  • Sharon G.
    Very positive appointment. ☺️
  • kamal g.
    Good service, short waiting time.
  • Casey S.
    Kind, caring staff! Knowledgeable, understanding and empathetic to a patients needs!
  • Roger S.
    This is my third visit to Ophthalmology LTD and I continue to marvel at what a well oiled machine you are. It is very well organized as you move from one station to the next. At each station... read more
  • Kathy-Russ M.
    the staff is amazing and great personalitys .awesome experience would recommend to anyone needing eye care
  • Amy K.
    Such a kind, compassionate and funny doctor. She listened to my concerns and joked with my husband and I making a stressful situation easier.
  • Steve W.
    Dr Walters is a wonderful caring person. She is friendly and very professional as well. I would recommend her and the Clinic to everyone.
  • Kelly &.
    Dr. Eric Thomas was patient, answered all questions, and didn't seem rushed through the process.
  • John W.
    I am treated for glaucoma by Dr Karen Dickes of Ophthalmology, Ltd. I have total trust and confidence in her treatment and very much enjoy our physician-patient relationship.
  • Brenda S.
    Great office from front desk , Dr, and Dr staff..